Thermostat lock cover



FIG. 1 is a front, top, and right perspective view of a thermostat lock cover showing claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front, bottom, and right perspective view thereof;

FIG. 9 is a perspective view thereof in use, in which a thermostat is inserted; and,

FIG. 10 is an exploded view of FIG. 9.

The broken lines shown in FIGS. 9 and 10 depict environment and form no part of the claimed design. 

CLAIM The ornamental design for a thermostat lock cover, as shown and described. 